A comparative evaluation of equivalent circuit and finite element electrical skin modelling techniques
A comparative evaluation of equivalent circuit and finite element electrical skin modelling techniques
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等效电路和有限元电皮肤建模技术的比较评估
DOI：
10.1088/2057-1976/acfb04
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发表时间：
2023
影响因子：
1.4
通讯作者：
Greig T
中科院分区：
文献类型：
--
作者：
Greig T
数学模型对于我们理解皮肤的电学性质是必不可少的。本文对等效电路和有限元仿真两种仿真模型进行了研究和比较，以评价它们的准确性。测量了放置在皮肤上的一对电极的阻抗谱，在100赫兹到50兆赫之间(可用的频谱分析仪的限制)，这些频谱被用来找到标准等效电路模型的参数。结果表明，等效电路的分量可能代表了文献所示的皮肤生理学的不同部分。在COMSOL中构建了一个模拟模型，每个皮肤层的尺寸、介电常数和电导率取自已发表的文献。测试了该模型对组织层厚度以及层与层之间边界形状的敏感性。研究发现，改变层的厚度只对角质层和真皮有显著的影响，改变层之间边界的形状在某些较高的频率(>；1 kHz)下会产生高达两倍的阻抗变化。虽然两个模型生成的阻抗曲线具有相同的总体轮廓，但它们的直流阻抗值存在高达100倍的差异。这表明，对不同频率的电信号如何通过皮肤的广泛理解是正确的，但已发表的皮肤层，特别是角质层的属性存在严重不足，为开发更好的模型需要找到这些属性的更准确的值。
Mathematical models are essential to our understanding of the electrical properties of the skin. In this paper, two types of simulation model, an equivalent circuit and a finite element simulation were investigated and compared to evaluate their accuracy. Impedance spectra were measured, between 100 Hz and 50 MHz,(the limits of the available spectrum analyser) of a pair of electrodes placed on skin and these spectra used to find the parameters of a standard equivalent circuit model. The resulting indicated that the components of the equivalent circuit may represent different parts of the skin physiology that indicated by the literature. A simulation model was constructed in COMSOL, with the dimensions, permittivity and conductivity of each skin layer taken from across the published literature. This model was tested for sensitivity to the thicknesses of tissue layers as well as the shape of the boundary between layers. It was found that changing the layer thicknesses only had a significant effect for the stratum corneum and dermis, and that changing the shape of the boundary between layers created an impedance change of up to two times at certain higher frequencies (> 1 kHz). While the impedance curves generated by the two models had the same overall profile, there was a difference of up to 100 times in their DC impedance values. This indicated that the broad understanding of how electrical signals of different frequencies pass through the skin is correct, but that significant insufficiencies exist in the published properties of the skin layers, particularly the stratum corneum and that finding more accurate values for these properties is necessary for the development of better models.
影响因子：
3.4
作者：
Huclova, Sonja;Erni, Daniel;Froehlich, Juerg
通讯作者：
Froehlich, Juerg
影响因子：
4.6
作者：
Hartinger, Alzbeta E.;Guardo, Robert;Gagnon, Herve
通讯作者：
Gagnon, Herve
影响因子：
6.5
作者：
HOLBROOK, KA;ODLAND, GF
通讯作者：
ODLAND, GF